--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/test/java/lang/management/ThreadMXBean/DisableTest.java	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,102 @@
+/*
+ * Copyright 2003-2004 Sun Microsystems, Inc.  All Rights Reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+/*
+ * @test
+ * @bug     4956978
+ * @summary The capability is disabled regardless of number of times
+ *          it was enabled.
+ * @author  Mandy Chung
+ */
+
+import java.lang.management.ThreadMXBean;
+import java.lang.management.ManagementFactory;
+
+public class DisableTest {
+    private static ThreadMXBean tm = ManagementFactory.getThreadMXBean();
+
+    public static void main(String args[]) throws Exception {
+        testThreadContentionMonitoring();
+        testThreadCpuMonitoring();
+
+        System.out.println("Test passed.");
+    }
+
+    private static void testThreadContentionMonitoring()
+        throws Exception {
+        if (!tm.isThreadContentionMonitoringSupported()) {
+            System.out.println("JVM does not supports thread contention monitoring");
+            return;
+        }
+
+        // Default is false.
+        tm.setThreadContentionMonitoringEnabled(false);
+        tm.setThreadContentionMonitoringEnabled(false);
+
+        // check if disabled
+        if (tm.isThreadContentionMonitoringEnabled()) {
+            throw new RuntimeException("TEST FAILED: " +
+                "Expected thread contention monitoring to be disabled");
+        }
+
+        tm.setThreadContentionMonitoringEnabled(true);
+        // check if enabled
+        if (!tm.isThreadContentionMonitoringEnabled()) {
+            throw new RuntimeException("TEST FAILED: " +
+                "Expected thread contention monitoring to be enabled");
+        }
+    }
+
+    private static void testThreadCpuMonitoring()
+        throws Exception {
+        if (!tm.isThreadCpuTimeSupported()) {
+            System.out.println("JVM does not support thread CPU time monitoring");
+            return;
+        }
+
+        if (tm.isThreadCpuTimeEnabled()) {
+            tm.setThreadCpuTimeEnabled(false);
+        }
+
+        // check if disabled
+        if (tm.isThreadCpuTimeEnabled()) {
+            throw new RuntimeException("TEST FAILED: " +
+                "Expected thread CPU time monitoring to be disabled");
+        }
+
+        tm.setThreadCpuTimeEnabled(false);
+        tm.setThreadCpuTimeEnabled(false);
+
+        if (tm.isThreadCpuTimeEnabled()) {
+            throw new RuntimeException("TEST FAILED: " +
+                "Expected thread CPU time monitoring to be disabled");
+        }
+
+        tm.setThreadCpuTimeEnabled(true);
+        if (!tm.isThreadCpuTimeEnabled()) {
+            throw new RuntimeException("TEST FAILED: " +
+                "Expected thread CPU time monitoring to be disabled");
+        }
+    }
+
+}